On The Weekend Watch:
PREMIERES, PREMIERES . . . -- The onrush of new series has slowed to a trickle. As far as we can tell, just three shows are to be seen for the first time in the coming days: "Reunion," at 7:30 p.m. Saturday on Channel 45, with James Brolin reuniting a variety of famous and not so famous families and friends; "Super Force," at 8 p.m. Saturday on Channel 54, a futuristic crime-solving show, and the Fox comedy "Good Grief," at 9:30 p.m. Sunday on Channel 45, with Howie Mandel as co-proprietor of a mortuary.
. . . AND SEASON DEBUTS -- A large number of returning shows, including the resolution of a couple of cliffhangers, are making their season returns (check listings for details). On Friday come "Quantum Leap," "Night Court," "Wings" and "Midnight Caller" on NBC, "Bagdad Cafe" on CBS and "Perfect Strangers" on ABC. Saturday brings a special flash-forward premiere of ABC's "China Beach," and a 16th season for NBC's "Saturday Night Live." And for cultists of distinctly different tastes, Sunday brings new seasons to these series: "Star Trek: The Next Generation" (at 6 p.m., Channel 45, although also catchable at 6 p.m. Saturday on Channel 20), resolving whether Capt. Picard (Patrick Stewart) will stay an evil Borg; "Masterpiece Theatre" on PBS (9 p.m., channels 22 and 67), with Harold Pinter's "The Heat of the Day," and finally, "Twin Peaks" (at 9, Channel 13), which probably will not resolve much mystery at all.